A playground slide is 7.50 ft long and makes an angle of 34.0°with the horizontal. A 59.0-kg child, initially at the top, slidesall the way down to the bottom of the slide.
(a) Choosing the bottom of the slide as the referenceconfiguration, what is the system's potential energy when the childis at the top and at the bottom of the slide? What is the change inpotential energy as the child slides from the top to the bottom ofthe slide? (Include the sign of the value in your answer.)
Utop | =Â Â J |
Ubottom | =Â Â J |
ΔU | =  J |
(b) Repeat part (a), choosing the top of the slide as the referenceconfiguration. (Include the sign of the value in your answer.)
Utop | =Â Â J |
Ubottom | =Â Â J |
ΔU | =  J |
